WGU D312 Anatomy & Physiology
OBJECTIVE ASSESSMENT Comprehensive Resource To Help You
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ELABORATED 100% Correct COMPLETE SOLUTIONS
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Current Update!!
1. Which of the following provides a long-term response to changes in blood pressure?
a. baroreceptor-initiated reflexes
b. chemoreceptor-initiated reflexes
c. neural controls
d. renal regulation - Correct Answer: renal regulation
2. Peripheral resistance ________.
A) decreases with increasing length of the blood vessel
B) increases as blood vessel diameter increases
C) increases as blood viscosity increases
D) is not a major factor in blood pressure in healthy individuals - Correct Answer: increases
as blood viscosity increases
3. Which tunic of an artery is most responsible for maintaining blood pressure and continuous
blood circulation?
a. tunica externa
b. tunica adventitia
c. tunica media
,d. tunica intima - Correct Answer: tunica media
4. The form of circulatory shock known as hypovolemic shock is ________.
a. any condition in which blood vessels are inadequately filled and blood cannot circulate
normally
b. shock that results from large-scale loos of blood volume, or after severe vomiting or diarrhea
c. always fatal
d. the form of shock caused by anaphylaxis - Correct Answer: shock that results from large-
scale loos of blood volume, or after severe vomiting or diarrhea
5. Which of the following is the most significant source of blood flow resistance
a. blood vessel diameter
b. blood viscosity
c. blood vessel type
d. total blood vessel length - Correct Answer: blood vessel diameter
6. The pulse rate depends on all of the following except one. select the one answer that does
NOT affect a pulse rate reading
a. postural changes
b. the vessel selected to palpate
c. emotions
d. activity - Correct Answer: the vessel selected to palpate
7. Which of the following is least involved in pulmonary circulation
a. pulmonary arteries and veins
b. superior vena cava
c. right ventricle
,d. left atrium - Correct Answer: superior vena cava
8. Which of the following is NOT true regarding fenestrated capillaries
a. fenestrated capillaries form the blood-brain barrier
b. fenestrated capillaries are essential for filtration of blood plasma in the kidney
c. fenestrated capillaries in endocrine organs allow hormones rapid entry into the blood
d. fenestrated capillaries in the small intestine receive nutrients from digested food - Correct
Answer: fenestrated capillaries form the blood-brain barrier
9. Factors that aid venous return include all except ________.
a. urinary output
b. pressure changes in the thorax
c. activity of skeletal muscles
d. venous valves - Correct Answer: urinary output
10. The short-term controls of blood pressure, mediated by the nervous system and
bloodborne chemicals, primarily operate via all but which of the following?
a. chemoreceptors
b. altering blood volume
c. reflex arcs associated with vasomotor fibers
d. reflex arcs involving baroreceptors - Correct Answer: altering blood volume
11. The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the
following?
a. a decrease in oxygen levels
b. a decrease in carbon dioxide
c. changes in arterial pressure
, d. an increase in oxygen levels - Correct Answer: changes in arterial pressure
12. Small secondary lymphoid organs, which cluster along lymphatic vessels, are termed
________.
a. lacteals
b. lymph follicles
c. lymphatics
d. lymph nodes - Correct Answer: lymph nodes
13. Which of the following would NOT be classified as a lymphoid organ?
a. peyer's patch of the intestine
b. tonsils
c. pancreas
d. spleen - Correct Answer: pancreas
14. Lymph transport involves all except?
a. milking action of active muscle fibers
b. smooth muscle contraction in the lymph capillary walls
c. lymph capillary minivalve action
d. thorax pressure changes during breathing - Correct Answer: smooth muscle contraction
in the lymph capillary walls
15. Which lymphatic structure drains lymph from the right upper limb and the right side of the
head and thorax?
a. lumbar trunk
b. right lymphatic duct
c. cisterna chyli
OBJECTIVE ASSESSMENT Comprehensive Resource To Help You
Ace 2026-2027 Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update!!
1. Which of the following provides a long-term response to changes in blood pressure?
a. baroreceptor-initiated reflexes
b. chemoreceptor-initiated reflexes
c. neural controls
d. renal regulation - Correct Answer: renal regulation
2. Peripheral resistance ________.
A) decreases with increasing length of the blood vessel
B) increases as blood vessel diameter increases
C) increases as blood viscosity increases
D) is not a major factor in blood pressure in healthy individuals - Correct Answer: increases
as blood viscosity increases
3. Which tunic of an artery is most responsible for maintaining blood pressure and continuous
blood circulation?
a. tunica externa
b. tunica adventitia
c. tunica media
,d. tunica intima - Correct Answer: tunica media
4. The form of circulatory shock known as hypovolemic shock is ________.
a. any condition in which blood vessels are inadequately filled and blood cannot circulate
normally
b. shock that results from large-scale loos of blood volume, or after severe vomiting or diarrhea
c. always fatal
d. the form of shock caused by anaphylaxis - Correct Answer: shock that results from large-
scale loos of blood volume, or after severe vomiting or diarrhea
5. Which of the following is the most significant source of blood flow resistance
a. blood vessel diameter
b. blood viscosity
c. blood vessel type
d. total blood vessel length - Correct Answer: blood vessel diameter
6. The pulse rate depends on all of the following except one. select the one answer that does
NOT affect a pulse rate reading
a. postural changes
b. the vessel selected to palpate
c. emotions
d. activity - Correct Answer: the vessel selected to palpate
7. Which of the following is least involved in pulmonary circulation
a. pulmonary arteries and veins
b. superior vena cava
c. right ventricle
,d. left atrium - Correct Answer: superior vena cava
8. Which of the following is NOT true regarding fenestrated capillaries
a. fenestrated capillaries form the blood-brain barrier
b. fenestrated capillaries are essential for filtration of blood plasma in the kidney
c. fenestrated capillaries in endocrine organs allow hormones rapid entry into the blood
d. fenestrated capillaries in the small intestine receive nutrients from digested food - Correct
Answer: fenestrated capillaries form the blood-brain barrier
9. Factors that aid venous return include all except ________.
a. urinary output
b. pressure changes in the thorax
c. activity of skeletal muscles
d. venous valves - Correct Answer: urinary output
10. The short-term controls of blood pressure, mediated by the nervous system and
bloodborne chemicals, primarily operate via all but which of the following?
a. chemoreceptors
b. altering blood volume
c. reflex arcs associated with vasomotor fibers
d. reflex arcs involving baroreceptors - Correct Answer: altering blood volume
11. The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the
following?
a. a decrease in oxygen levels
b. a decrease in carbon dioxide
c. changes in arterial pressure
, d. an increase in oxygen levels - Correct Answer: changes in arterial pressure
12. Small secondary lymphoid organs, which cluster along lymphatic vessels, are termed
________.
a. lacteals
b. lymph follicles
c. lymphatics
d. lymph nodes - Correct Answer: lymph nodes
13. Which of the following would NOT be classified as a lymphoid organ?
a. peyer's patch of the intestine
b. tonsils
c. pancreas
d. spleen - Correct Answer: pancreas
14. Lymph transport involves all except?
a. milking action of active muscle fibers
b. smooth muscle contraction in the lymph capillary walls
c. lymph capillary minivalve action
d. thorax pressure changes during breathing - Correct Answer: smooth muscle contraction
in the lymph capillary walls
15. Which lymphatic structure drains lymph from the right upper limb and the right side of the
head and thorax?
a. lumbar trunk
b. right lymphatic duct
c. cisterna chyli
